patch 9.0.1036: undo misbehaves when writing from an insert mode mapping
Problem: Undo misbehaves when writing from an insert mode mapping.
Solution: Sync undo when writing. (closes #11674)
diff --git a/src/testdir/test_undo.vim b/src/testdir/test_undo.vim
index ce7b0dc..2529e21 100644
--- a/src/testdir/test_undo.vim
+++ b/src/testdir/test_undo.vim
@@ -3,6 +3,9 @@
" undo-able pieces. Do that by setting 'undolevels'.
" Also tests :earlier and :later.
+source check.vim
+source screendump.vim
+
func Test_undotree()
new
@@ -775,4 +778,30 @@
bwipe!
endfunc
+func Test_undo_after_write()
+ " use a terminal to make undo work like when text is typed
+ CheckRunVimInTerminal
+
+ let lines =<< trim END
+ edit Xtestfile.txt
+ set undolevels=100 undofile
+ imap . <Cmd>write<CR>
+ write
+ END
+ call writefile(lines, 'Xtest_undo_after_write', 'D')
+ let buf = RunVimInTerminal('-S Xtest_undo_after_write', #{rows: 6})
+
+ call term_sendkeys(buf, "Otest.\<CR>boo!!!\<Esc>")
+ sleep 100m
+ call term_sendkeys(buf, "u")
+ call VerifyScreenDump(buf, 'Test_undo_after_write_1', {})
+
+ call term_sendkeys(buf, "u")
+ call VerifyScreenDump(buf, 'Test_undo_after_write_2', {})
+
+ call StopVimInTerminal(buf)
+ call delete('Xtestfile.txt')
+endfunc
+
+
" vim: shiftwidth=2 sts=2 expandtab